280 lines
7.1 KiB
C
280 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* interfaces to Chassis Codes via PDC (firmware)
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*
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* Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
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* Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org>
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*
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* TODO: poll chassis warns, trigger (configurable) machine shutdown when
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* needed.
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* Find out how to get Chassis warnings out of PAT boxes?
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*/
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#undef PDC_CHASSIS_DEBUG
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#ifdef PDC_CHASSIS_DEBUG
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#define DPRINTK(fmt, args...) printk(fmt, ## args)
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#else
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#define DPRINTK(fmt, args...)
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#endif
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/panic_notifier.h>
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#include <linux/reboot.h>
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#include <linux/notifier.h>
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#include <linux/cache.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <asm/pdc_chassis.h>
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#include <asm/processor.h>
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#include <asm/pdc.h>
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#include <asm/pdcpat.h>
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#define PDC_CHASSIS_VER "0.05"
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#ifdef CONFIG_PDC_CHASSIS
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static unsigned int pdc_chassis_enabled __read_mostly = 1;
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/**
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* pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
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* @str configuration param: 0 to disable chassis log
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* @return 1
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*/
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static int __init pdc_chassis_setup(char *str)
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{
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/*panic_timeout = simple_strtoul(str, NULL, 0);*/
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get_option(&str, &pdc_chassis_enabled);
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return 1;
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}
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__setup("pdcchassis=", pdc_chassis_setup);
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/**
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* pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
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* @pdc_chassis_old: 1 if old pdc chassis style
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*
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* Currently, only E class and A180 are known to work with this.
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* Inspired by Christoph Plattner
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*/
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#if 0
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static void __init pdc_chassis_checkold(void)
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{
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switch(CPU_HVERSION) {
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case 0x480: /* E25 */
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case 0x481: /* E35 */
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case 0x482: /* E45 */
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case 0x483: /* E55 */
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case 0x516: /* A180 */
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break;
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default:
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break;
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}
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DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
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}
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#endif
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/**
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* pdc_chassis_panic_event() - Called by the panic handler.
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*
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* As soon as a panic occurs, we should inform the PDC.
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*/
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static int pdc_chassis_panic_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
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return NOTIFY_DONE;
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}
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static struct notifier_block pdc_chassis_panic_block = {
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.notifier_call = pdc_chassis_panic_event,
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.priority = INT_MAX,
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};
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/**
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* parisc_reboot_event() - Called by the reboot handler.
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*
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* As soon as a reboot occurs, we should inform the PDC.
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*/
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static int pdc_chassis_reboot_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
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return NOTIFY_DONE;
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}
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static struct notifier_block pdc_chassis_reboot_block = {
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.notifier_call = pdc_chassis_reboot_event,
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.priority = INT_MAX,
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};
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#endif /* CONFIG_PDC_CHASSIS */
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/**
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* parisc_pdc_chassis_init() - Called at boot time.
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*/
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void __init parisc_pdc_chassis_init(void)
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{
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#ifdef CONFIG_PDC_CHASSIS
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if (likely(pdc_chassis_enabled)) {
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DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
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/* Let see if we have something to handle... */
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printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
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is_pdc_pat() ? "PDC_PAT" : "regular",
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PDC_CHASSIS_VER);
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/* initialize panic notifier chain */
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atomic_notifier_chain_register(&panic_notifier_list,
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&pdc_chassis_panic_block);
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/* initialize reboot notifier chain */
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register_reboot_notifier(&pdc_chassis_reboot_block);
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}
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#endif /* CONFIG_PDC_CHASSIS */
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}
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/**
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* pdc_chassis_send_status() - Sends a predefined message to the chassis,
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* and changes the front panel LEDs according to the new system state
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* @retval: PDC call return value.
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*
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* Only machines with 64 bits PDC PAT and those reported in
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* pdc_chassis_checkold() are supported atm.
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*
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* returns 0 if no error, -1 if no supported PDC is present or invalid message,
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* else returns the appropriate PDC error code.
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*
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* For a list of predefined messages, see asm-parisc/pdc_chassis.h
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*/
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int pdc_chassis_send_status(int message)
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{
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/* Maybe we should do that in an other way ? */
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int retval = 0;
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#ifdef CONFIG_PDC_CHASSIS
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if (likely(pdc_chassis_enabled)) {
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DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);
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#ifdef CONFIG_64BIT
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if (is_pdc_pat()) {
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switch(message) {
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case PDC_CHASSIS_DIRECT_BSTART:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
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break;
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case PDC_CHASSIS_DIRECT_BCOMPLETE:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
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break;
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case PDC_CHASSIS_DIRECT_SHUTDOWN:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
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break;
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case PDC_CHASSIS_DIRECT_PANIC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
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break;
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case PDC_CHASSIS_DIRECT_LPMC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
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break;
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case PDC_CHASSIS_DIRECT_HPMC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
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break;
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default:
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retval = -1;
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}
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} else retval = -1;
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#else
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if (1) {
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switch (message) {
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case PDC_CHASSIS_DIRECT_BSTART:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT));
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break;
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case PDC_CHASSIS_DIRECT_BCOMPLETE:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
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break;
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case PDC_CHASSIS_DIRECT_SHUTDOWN:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
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break;
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case PDC_CHASSIS_DIRECT_HPMC:
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case PDC_CHASSIS_DIRECT_PANIC:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
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break;
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case PDC_CHASSIS_DIRECT_LPMC:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
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break;
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default:
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retval = -1;
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}
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} else retval = -1;
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#endif /* CONFIG_64BIT */
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} /* if (pdc_chassis_enabled) */
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#endif /* CONFIG_PDC_CHASSIS */
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return retval;
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}
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#ifdef CONFIG_PDC_CHASSIS_WARN
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#ifdef CONFIG_PROC_FS
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static int pdc_chassis_warn_show(struct seq_file *m, void *v)
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{
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unsigned long warn;
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u32 warnreg;
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if (pdc_chassis_warn(&warn) != PDC_OK)
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return -EIO;
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warnreg = (warn & 0xFFFFFFFF);
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if ((warnreg >> 24) & 0xFF)
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seq_printf(m, "Chassis component failure! (eg fan or PSU): 0x%.2x\n",
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(warnreg >> 24) & 0xFF);
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seq_printf(m, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK");
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seq_printf(m, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK");
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seq_printf(m, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK");
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return 0;
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}
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static int __init pdc_chassis_create_procfs(void)
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{
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unsigned long test;
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int ret;
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ret = pdc_chassis_warn(&test);
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if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) {
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/* seems that some boxes (eg L1000) do not implement this */
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printk(KERN_INFO "Chassis warnings not supported.\n");
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return 0;
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}
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printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
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PDC_CHASSIS_VER);
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proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show);
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return 0;
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}
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__initcall(pdc_chassis_create_procfs);
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#endif /* CONFIG_PROC_FS */
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#endif /* CONFIG_PDC_CHASSIS_WARN */
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